Results 31 to 40 of about 138,641 (137)
Accelerating Just Energy Transitions in Brazil: Pathways for Social Development
ABSTRACT This critical article analyzes energy poverty in Brazil from the theoretical perspective of distributive justice, proposing the implementation of a new social regulation called Contribution to Social Development. The goal is to support the process of a just energy transition leading to a broader debate on energy planning and social issues ...
Marcio Giannini Pereira +5 more
wiley +1 more source
35kV交流汇集是目前海上风电场集电系统的通用集电方案。随着对海上风场单位成本降低的追求和技术的发展,海上风机单机容量越来越大。然而,由于35kV海底电缆热极限和通流能力的限制,单机容量的增大使得单根海缆上可连接的风机数目随之减少。随着海上风电场规模的扩大和单机容量的增加,如果仍采用35kV交流集电方案,海底电缆的数目势必增加,电缆投资及相应工程费用和难度也将增大。据此,提出了66kV交流集电方案,并基于一组典型案例,对35kV和66kV海上风电交流集电方案进行了技术经济性比对 ...
蔡蓉 +4 more
doaj +1 more source
ABSTRACT Time and chronology form the invisible architecture upon which modern civilization depends, governing synchronization across markets, power grids, communication networks, transportation, and defense. Yet, this shared temporal framework, engineered through atomic clocks, satellites, and digital synchronization, faces growing vulnerabilities ...
Bilal M. Ayyub
wiley +1 more source
应用于海上风电接入的VSC-HVDC系统主网侧交流故障穿越方案 [PDF]
海上风电是可再生能源的重要形式和组成部分,通过基于电压源换流器的高压直流输电(VSC-HVDC)技术进行风电的远距离接入,使远离海岸的区域建设风电场成为可能,另外该技术也具备更大规模风场的接入能力。目前世界范围已有多个应用VSC-HVDC输电系统将海上风电场接入到陆上主电网的工程规划。然而,大规模风电会对系统的稳定性带来诸多挑战,尤其需要确保在故障工况下风电场及主电网的稳定性,VSC-HVDC以其优良的灵活性成为应对此类挑战的不二选择。本文对不同风电接入方式下系统的故障穿越方案进行了总结,对VSC ...
王国英 +3 more
doaj +1 more source
ABSTRACT Existing literature largely agrees that authoritarian regimes establish channels for political participation to gather valuable information on citizens' anti‐regime sentiments and policy preferences and to supervise lower‐level bureaucrats and firms.
Anton Bogs
wiley +1 more source
在JF-10高焓激波风洞中利用氢氧爆轰驱动方法获得了总压12.4MPa、总温7440K的高超声速试验气流,采用自行研制的能够获得足够空间分辨率且不影响流场结构的针状电子探针,对10°尖劈模型进行流场电子密度测量;试验结果表明:研制的探针具有较高的测量灵敏度及空间分辨率 ...
姜宗林, 汪球, 余西龙, 赵伟
core +2 more sources
Background Working memory updating is crucial in bilingual children′s second language (L2) reading comprehension. A robust updating ability is a cognitive key for children to successfully master L2 reading comprehension. Objective This study is aimed at investigating the effect of updating ability on the L2 Chinese reading comprehension among Uyghur ...
Guangxin Li +3 more
wiley +1 more source
由于目前风电场出线容量整定计算时,标准风速远小于风机实际运行风速,造成了风场出线输送能力的浪费。文中提出了一种综合考虑风机出力特性和输电线路允许载流量变化特性的风电场出线增容方法。通过分析风机的风速功率曲线和输电线路最大载流量计算模型,将风机总功率和导线最大载流量在不同风速下进行动态匹配,以作为运行和设计中增容方案制定的基础。对于运行中的风电场,计算风机极限投运量;正在设计阶段中的风电场送出线路,降低所用导线的截面积。经实例分析,该方法有效增大了风电场的出线容量,提高了风电场运行经济性。
秦嘉南 +4 more
doaj
随着风力发电的供需日益增长,风力发电机越来越多地被安装在具有高土壤电阻率和高雷击发生率的次优地理位置,这使得风力发电机的防雷系统成为风电场设计的关键因素。有效的防雷系统不仅保证了风力发电机物理结构和运行控制人员的安全,还可保护风力发电机内部的电气控制系统,以实现风能的高效消纳。基于此,文中提出了一种适用于风电场的防雷系统有效性评估新方法,在风电场早期规划阶段采用所提评估方法,可减少雷击引起的WT停机时间,从而提高风机的发电量。考虑到接地系统在风电场防雷系统中起着至关重要的作用 ...
杨俊 +5 more
doaj
ABSTRACT This paper provides a retrospective on California's oversight of 1,3‐dichloropropene (1,3‐D). It utilizes archival documents, including internal memos, emails, and risk assessments, to demonstrate how the state's Department of Pesticide Regulation consistently expanded allowable 1,3‐D use while presenting each policy change as scientifically ...
Kaitlyn Alvarez Noli
wiley +1 more source

